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Modbus Gateway ME30-24/E4(M)

Thank you for choosing Commercial Air Conditioners, please read this owner’s manual carefully before operation and retain it for future reference.

Commercial Air ConditionersOwner's Manual

User NoticesPlease read this manual carefully before installation and operation and strictly observe the

installation and operation instructions covered in this manual. In addition, careful attention shall be drawn to the following two symbols.

WARNING

It indicates, if operated improperly, it would lead to bodily injury or severe damage.

The installation shall be done by the skilled serviceman; otherwise it would lead to a fire hazard or electric shock.

Be sure the power plug is inserted into the socket only after it is dried and cleaned.

Do not touch the gateway before its power supply is cut off.

Do not touch the gateway with wet hands; otherwise it would lead to electric shock.

installation is in poor condition.

Be sure the power supply is connected in the correct sequence and the power supply is

damaged.

Place the gateway inside an indoor electric cabinet which is inaccessible and locked.

Do not locate the gateway where it would be subject to electromagnetic interference or dust.

CAUTION

It indicates, if operated improperly, the equipment would be damaged.

Be sure proper power supply is provided, otherwise the gateway will fail to work or even be damaged.

Be sure all devices are placed correctly, otherwise communication would go abnormally.

Be sure the communication line is connected to the correct port, otherwise communication would go abnormally.The connected communication line should be protected with the insulating tape against oxidation and short circuit.Normal working conditions: 1) temperature: -20~+70o

location: inside an indoor electric cabinet, not subject to direct sunlight, rain and snow etc.

Contents

1 General ............................................................................................................1

2 Check before Installation ................................................................................. 1

...................................................................................... 2

.................................................................................................. 2

.......................................................................................... 4

............................................................................................ 4

4 Applications ..................................................................................................... 7

............................... 7

.......................................................................................................... 7

.................................................................................

......................................................................................................9

.................. 9

...................................................................................... 10

................................................

... 19

.......... 22

C-1 Debug the cooling system ..................................................................... 22

C-2 Communication debugging of Modbus gateway and air conditioning units ...

...............................................

C-4 Communicaiton debugging of Modbus gateway and remote monitoring system .......... 24

1

1 GeneralModbus gateways for the central air conditioning system are used to bridge the internal

and is enabled to take the real-time monitoring and the long-distance control to the air conditioning

Modbus gateway will stop the air conditioning system immediately).

2 Check before InstallationPlease check for the items listed below prior to installation.

Modbus Gateway 1

Installation and Operation Manual 1

2

CAN Interface,to the air conditioning system

RS485-1 Interface,to Web-based Remote

Monitoring and Control System/BMS

Digital Input

Digital Output

Power Input

POWER INPUT

WARNING

Do not touch the input port of the power supply when the gateway is energized.

CAN Interface: it is connected to the air conditioning system through twisted pairs so as to get through the communication between the Modbus gateway and the air conditioning system.

RS485-1 Interface: It is connected to Web-based Remote Monitoring and Control

RS485-2 Interface: it is reserved .

DI1...DI5Digital inputs: binary (0/1) digital signals, applicable to passive inputs.DI 1

signal “1”, which indicates that the Modbus gateway will stop the whole air conditioning system at

will resume the normal operation.DI2...DI5

it is opened.

K5 K4 K3 K2 K1

Fire signal

DO1...DO5Digital outputs: relay outputs, normally open contacts.

input the binary signal “0”, its two contacts will be opened.

4

Power Supply

CANRX

the air conditioning system).

TXconditioning system).

RX

TX

RX It is reserved.

TX It is reserved.

RX It is reserved.

TX It is reserved.

POWER It lights on when the Modbus gateway is powered normally.

RUN

It is reserved.

CAUTION

The DIP switches shall be set prior to operation of the gateway.

This Modbus gateway includes two kinds of DIP switches, address DIP switch and function DIP switch.

The address DIP switch is intended to set the address of the Modbus gateway, which should

address of the same Modbus bus is not allowed to be repeated, otherwise communication would fail.

CAUTION

The master outdoor unit of air conditioning system or the gateway located at either end of the CAN2 bus

communication would fail.

The eighth position of this function DIP switch is used to set the matched resistance of the CAN2 bus.

When the Modbus gateway is located at either end of the CAN2 bus, it shall be coupled with a matched resistance and the eighth position should be set to “0”.

When the Modbus gateway is located at neither end of the CAN2 bus, no matched resistance is required the eighth position should be set to “1”.

CAN2 Bus

Master outdoor unit of system 1


Master outdoor unit of system n

Matched resistance

required Matched resistance required not

Matched resistance required not

Matched resistance required

n

The seventh position of this function DIP switch is used to set the matched resistance for the

transmission line.In application of the Modbus gateway, an upper unit as the terminal unit is usually coupled

resistance.When the Modbus gateway is required to be set with a matched resistance, the seventh

position of this DIP switch should be set to "0" and the gateway should be located at the end of the

7

4.3, each indoor unit has an

When the indoor unit number is beyond the range defined by the gateway, it should be

4 ApplicationsThe Modbus gateway is generally applied in the following two systems.

The Modbus gateway is applicable to be used to integrate the air conditioning system, including

Indoor unitIndoor unit

Master outdoor unit

Master outdoor unit

Mater outdoor unit

Slave outdoor unit

Slave outdoor unit Slave outdoor unit Slave outdoor unit

Slave outdoor unit Slave outdoor unit

Master outdoor unit

Slave outdoor unit

Slave outdoor unit

System 1 .

Either Web-based Remote Monitoring and Control System or BMS

CAN2 Network 1

CAN2 Network 2

To the next system

To the next system

To the next system

To next Modbus gateway

L1

L1

L2

L2

L2

L2L1

R1

L3

L3

L3

L3

System 16.

System 1 .

System 2.

CAN2 bus

CAN2 bus

CAN2 bus

Modbus bus

Mod

bus

bus

CAN

2 bu

sC

AN2

bus

Mod

bus

bus

System 1.

L2

L2

Internet

Web-based Remote Monitoring and Control System

(client side)

Web-based Remote Monitoring and Control System

(server side)

BMS

Other device Lighting Fire Vent Lift Electricity

RS232-RS485

Modbus gateway 1

Modbus gateway 2

Modbus gateway 3

Modbus gateway 255

Indoor unitIndoor unit

Indoor unitIndoor unit Indoor unitIndoor unit

Indoor unitIndoor unit Indoor unit

Indoor unitIndoor unit Indoor unit Indoor unit

Master outdoor unit

Converter

9

Modbus busCAN2 bus

master outdoor unit. CAN2 network

indoor units are allowed. If exceeded, the CAN2 network should be divided into two.Air conditioning system: one air conditioning system consists of at most four outdoor units

Allowable number accessible to the gateway: one Modbus gateway can support at most

CAN2 Network 2.

296mm

177mm

56mm

98.5mm

10

The Modbus gateway should be located inside the electric cabinet, hung up with the front side

for reference).

Address

Function

Address

Function

Address

Function

WARNING

Power lines and communication lines of the Modbus gateway should be routed separately; otherwise the Modbus gateway would fail to work.

The Modbus gateway works to get through the communication

Type Remarks

twisted pairs24AWG

An optoelectrical repeater is required when the communication distance is

Type 2) Remarks

copper twisted pairs The allowable

maximum length is

11

CAUTION

Only serial connection is allowed for all communication lines of the Modbus gateway. The star connection is prohibited

Web-based Remote Monitoring and Control System/BMS

Web-based Remote Monitoring and Control System/BMS




12







Step 1:

) .Step 2:

).Step 3: )

Step1: 5.2.2.

) .

Step 2: connect the Modbus gateway's CAN interface G1 and G2 to the interface G1 and G2 at ) .

Step 3:

and ) .

Step 1: 3.3.2 for the address setting of the Modbus gateway. Step 2: 3.3.3-3.3.4 for the matched resistance setting of the Modbus gateway.

tep 3: 3.3.5

14

Notes:

30 Modbus gateways at most is allowed between two repeaters.

The total communication distance of at most 800m is allowed between two repeaters.

of the CAN2 bus should be coupled with a matched resistance. The example listed below shows

12

ON

SA8

Master Outdoor Unit

Matched resistance

D1 D2 G1 G2

D1 D2 G1G2

Address DIPAdd

Address DIPAdd

1 2 4 7 1 2 4 7

0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0

1 0 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0

0 1 0 0 0 0 0 0 2 0 1 0 0 0 1 0 0

1 1 0 0 0 0 0 0 1 1 0 0 0 1 0 0

0 0 1 0 0 0 0 0 4 0 0 1 0 0 1 0 0

1 0 1 0 0 0 0 0 1 0 1 0 0 1 0 0

0 1 1 0 0 0 0 0 0 1 1 0 0 1 0 0

1 1 1 0 0 0 0 0 7 1 1 1 0 0 1 0 0

0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 40

1 0 0 1 0 0 0 0 9 1 0 0 1 0 1 0 0 41

0 1 0 1 0 0 0 0 10 0 1 0 1 0 1 0 0 42

1 1 0 1 0 0 0 0 11 1 1 0 1 0 1 0 0

0 0 1 1 0 0 0 0 12 0 0 1 1 0 1 0 0 44

1 0 1 1 0 0 0 0 1 0 1 1 0 1 0 0

0 1 1 1 0 0 0 0 14 0 1 1 1 0 1 0 0

1 1 1 1 0 0 0 0 1 1 1 1 0 1 0 0 47

0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0

1 0 0 0 1 0 0 0 17 1 0 0 0 1 1 0 0 49

0 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0

1 1 0 0 1 0 0 0 19 1 1 0 0 1 1 0 0

0 0 1 0 1 0 0 0 20 0 0 1 0 1 1 0 0

1 0 1 0 1 0 0 0 21 1 0 1 0 1 1 0 0

0 1 1 0 1 0 0 0 22 0 1 1 0 1 1 0 0

1 1 1 0 1 0 0 0 1 1 1 0 1 1 0 0

0 0 0 1 1 0 0 0 24 0 0 0 1 1 1 0 0

1 0 0 1 1 0 0 0 1 0 0 1 1 1 0 0

0 1 0 1 1 0 0 0 0 1 0 1 1 1 0 0

1 1 0 1 1 0 0 0 27 1 1 0 1 1 1 0 0

0 0 1 1 1 0 0 0 0 0 1 1 1 1 0 0

1 0 1 1 1 0 0 0 29 1 0 1 1 1 1 0 0

0 1 1 1 1 0 0 0 0 1 1 1 1 1 0 0

1 1 1 1 1 0 0 0 1 1 1 1 1 1 0 0

Address DIPAdd

Address DIPAdd

1 2 4 7 1 2 4 7

0 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0

1 0 0 0 0 0 1 0 1 0 0 0 0 1 1 0 97

0 1 0 0 0 0 1 0 0 1 0 0 0 1 1 0

1 1 0 0 0 0 1 0 1 1 0 0 0 1 1 0 99

0 0 1 0 0 0 1 0 0 0 1 0 0 1 1 0 100

1 0 1 0 0 0 1 0 1 0 1 0 0 1 1 0 101

0 1 1 0 0 0 1 0 70 0 1 1 0 0 1 1 0 102

1 1 1 0 0 0 1 0 71 1 1 1 0 0 1 1 0

0 0 0 1 0 0 1 0 72 0 0 0 1 0 1 1 0 104

1 0 0 1 0 0 1 0 1 0 0 1 0 1 1 0

0 1 0 1 0 0 1 0 74 0 1 0 1 0 1 1 0

1 1 0 1 0 0 1 0 1 1 0 1 0 1 1 0 107

0 0 1 1 0 0 1 0 0 0 1 1 0 1 1 0

1 0 1 1 0 0 1 0 77 1 0 1 1 0 1 1 0 109

0 1 1 1 0 0 1 0 0 1 1 1 0 1 1 0 110

1 1 1 1 0 0 1 0 79 1 1 1 1 0 1 1 0 111

0 0 0 0 1 0 1 0 0 0 0 0 1 1 1 0 112

1 0 0 0 1 0 1 0 1 0 0 0 1 1 1 0

0 1 0 0 1 0 1 0 0 1 0 0 1 1 1 0 114

1 1 0 0 1 0 1 0 1 1 0 0 1 1 1 0

0 0 1 0 1 0 1 0 0 0 1 0 1 1 1 0

1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 0 117

0 1 1 0 1 0 1 0 0 1 1 0 1 1 1 0

1 1 1 0 1 0 1 0 1 1 1 0 1 1 1 0 119

0 0 0 1 1 0 1 0 0 0 0 1 1 1 1 0 120

1 0 0 1 1 0 1 0 1 0 0 1 1 1 1 0 121

0 1 0 1 1 0 1 0 90 0 1 0 1 1 1 1 0 122

1 1 0 1 1 0 1 0 91 1 1 0 1 1 1 1 0

0 0 1 1 1 0 1 0 92 0 0 1 1 1 1 1 0 124

1 0 1 1 1 0 1 0 1 0 1 1 1 1 1 0

0 1 1 1 1 0 1 0 94 0 1 1 1 1 1 1 0

1 1 1 1 1 0 1 0 1 1 1 1 1 1 1 0 127

17

Address DIPAdd

Address DIPAdd

1 2 4 7 1 2 4 7

0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1

1 0 0 0 0 0 0 1 129 1 0 0 0 0 1 0 1

0 1 0 0 0 0 0 1 0 1 0 0 0 1 0 1

1 1 0 0 0 0 0 1 1 1 0 0 0 1 0 1

0 0 1 0 0 0 0 1 0 0 1 0 0 1 0 1

1 0 1 0 0 0 0 1 1 0 1 0 0 1 0 1

0 1 1 0 0 0 0 1 0 1 1 0 0 1 0 1

1 1 1 0 0 0 0 1 1 1 1 0 0 1 0 1

0 0 0 1 0 0 0 1 0 0 0 1 0 1 0 1

1 0 0 1 0 0 0 1 1 0 0 1 0 1 0 1

0 1 0 1 0 0 0 1 0 1 0 1 0 1 0 1 170

1 1 0 1 0 0 0 1 1 1 0 1 0 1 0 1 171

0 0 1 1 0 0 0 1 140 0 0 1 1 0 1 0 1 172

1 0 1 1 0 0 0 1 141 1 0 1 1 0 1 0 1

0 1 1 1 0 0 0 1 142 0 1 1 1 0 1 0 1 174

1 1 1 1 0 0 0 1 1 1 1 1 0 1 0 1

0 0 0 0 1 0 0 1 144 0 0 0 0 1 1 0 1

1 0 0 0 1 0 0 1 1 0 0 0 1 1 0 1 177

0 1 0 0 1 0 0 1 0 1 0 0 1 1 0 1

1 1 0 0 1 0 0 1 147 1 1 0 0 1 1 0 1 179

0 0 1 0 1 0 0 1 0 0 1 0 1 1 0 1

1 0 1 0 1 0 0 1 149 1 0 1 0 1 1 0 1

0 1 1 0 1 0 0 1 0 1 1 0 1 1 0 1

1 1 1 0 1 0 0 1 1 1 1 0 1 1 0 1

0 0 0 1 1 0 0 1 0 0 0 1 1 1 0 1

1 0 0 1 1 0 0 1 1 0 0 1 1 1 0 1

0 1 0 1 1 0 0 1 0 1 0 1 1 1 0 1

1 1 0 1 1 0 0 1 1 1 0 1 1 1 0 1

0 0 1 1 1 0 0 1 0 0 1 1 1 1 0 1

1 0 1 1 1 0 0 1 1 0 1 1 1 1 0 1

0 1 1 1 1 0 0 1 0 1 1 1 1 1 0 1 190

1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 1 191

Address DIPAdd

Address DIPAdd

1 2 4 7 1 2 4 7

0 0 0 0 0 0 1 1 192 0 0 0 0 0 1 1 1 224

1 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1

0 1 0 0 0 0 1 1 194 0 1 0 0 0 1 1 1

1 1 0 0 0 0 1 1 1 1 0 0 0 1 1 1 227

0 0 1 0 0 0 1 1 0 0 1 0 0 1 1 1

1 0 1 0 0 0 1 1 197 1 0 1 0 0 1 1 1 229

0 1 1 0 0 0 1 1 0 1 1 0 0 1 1 1

1 1 1 0 0 0 1 1 199 1 1 1 0 0 1 1 1

0 0 0 1 0 0 1 1 200 0 0 0 1 0 1 1 1

1 0 0 1 0 0 1 1 201 1 0 0 1 0 1 1 1

0 1 0 1 0 0 1 1 202 0 1 0 1 0 1 1 1

1 1 0 1 0 0 1 1 1 1 0 1 0 1 1 1

0 0 1 1 0 0 1 1 204 0 0 1 1 0 1 1 1

1 0 1 1 0 0 1 1 1 0 1 1 0 1 1 1

0 1 1 1 0 0 1 1 0 1 1 1 0 1 1 1

1 1 1 1 0 0 1 1 207 1 1 1 1 0 1 1 1

0 0 0 0 1 0 1 1 0 0 0 0 1 1 1 1 240

1 0 0 0 1 0 1 1 209 1 0 0 0 1 1 1 1 241

0 1 0 0 1 0 1 1 210 0 1 0 0 1 1 1 1 242

1 1 0 0 1 0 1 1 211 1 1 0 0 1 1 1 1

0 0 1 0 1 0 1 1 212 0 0 1 0 1 1 1 1 244

1 0 1 0 1 0 1 1 1 0 1 0 1 1 1 1

0 1 1 0 1 0 1 1 214 0 1 1 0 1 1 1 1

1 1 1 0 1 0 1 1 1 1 1 0 1 1 1 1 247

0 0 0 1 1 0 1 1 0 0 0 1 1 1 1 1

1 0 0 1 1 0 1 1 217 1 0 0 1 1 1 1 1 249

0 1 0 1 1 0 1 1 0 1 0 1 1 1 1 1

1 1 0 1 1 0 1 1 219 1 1 0 1 1 1 1 1

0 0 1 1 1 0 1 1 220 0 0 1 1 1 1 1 1

1 0 1 1 1 0 1 1 221 1 0 1 1 1 1 1 1

0 1 1 1 1 0 1 1 222 0 1 1 1 1 1 1 1

1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1

19

cooling systems

among different cooling systems. In such case, reset the project no. of each system and then follow the methods described below:

When there is central control among different cooling systems, if the project numbers of any

transfer in modes or operate functionally. The entire unit can’t be started up until error is eliminated. The Debugger software displays as below:

20

1)

operation. Display is as show below:

21

2)

controllers or remote controllers for the operation details. This method is not available when the IDU is under project debugging status.

Auto deviation setting of project no. in ODU’s main board:Auto deviation of IDU project numbers can be realized through the main board of outdoor unit.

will be in the standby status for function selection, as shown below:

Display way Current progress Display way Current status Display way

A7 blink 00 blink 00 blink

blink 00 blink 00 blink



n0 blink 01 blink 00 blink







00 Blink OC Blink

Display way Display way Current status Display way

00 OC

system will function as normal.

address is “00000”.)Remark: This handling method may change the project numbers of other normal units and it is

22

our

After the communication system is properly installed and connected, please follow the steps below to debug the communication system.

C-1 Debug the cooling systemBefore debugging the remote monitoring system, make sure the relevant settings of the air

Step 1: The setting of master unit in a single system and the central control address setting in multiple systems

service manual for the operation details).If multiple cooling systems are connected, make sure the central control address code of each

Step 2: Deviation setting of IDU project numbers

system will be in the standby status for function selection and master unit will display as below.Default display is “A7”. Display of the master unit is:



is as below:


lit up 00 blink 00 blink

deviation status of project numbers. Display is as below:


lit up 00 lit up 00 lit up

At that time, all project numbers of indoor units will be automatically deviated. After about 1min,

unit whose central control address is 0.)

for it is faster and easier. But this handling method may change the project numbers of other normal

C-2 Communication debugging of Modbus gateway and air conditioning unitsStep 1: CAN2 matched resistance setting

CAN2 Bus




Matched resistance

required Matched resistance required not

Matched resistance required not

Matched resistance required

n

As shown here, the master outdoor unit at the front end and back end of the CAN2 bus and the Modbus gateway need to be set with matched resistance.

the instruction manual to see how to add matched resistance to the Modbus gateway.The way to add matched resistance to system’s master outdoor units:

12

ON

SA8

Master Outdoor Unit

Matched resistance

D1 D2 G1 G2

D1 D2 G1G2

Step 2: Disconnect and then connect power for the air conditioning equipment and Modbus gateway.

Step 3: Check the status of communication indicators Check the CAN_RX indicator of Modbus gateway. If it blinks, then communication is ok.

TX is blinking or lit up. If the light is not lit up, please check the connection of communication cords and the setting of DIP switch.

Step 1:Please refer to section “3.3.2 Address DIP Switch” in the instruction manual to set the

address of Modbus gateway. Make sure the address codes of gateways on the same Modbus are

Step 2:

24

According to the range of IDU project number related to gateway, set the project number of indoor unit that’s at the beginning of gateway to be 1 or 129. Please refer to section 3.3.5 in the instruction manual for the operation method.

C-4 Communicaiton debugging of Modbus gateway and remote monitoring system

After the software of remote monitoring system is successfully installed, please follow the steps below.

Step 1:

Step 2:

“open”.

b.

service will be energized.

Step 3:

Step 4:

27

After the detection, the detected equipment will be shown below the Net tree. Communication debugging is completed.

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